WO2012041133A1

WO2012041133A1 - Surgical milling cutter

Info

Publication number: WO2012041133A1
Application number: PCT/CN2011/078817
Authority: WO
Inventors: 叶雷; 周健; 冯华; 李飞; 祝恒洋; 李从晓
Original assignee: 重庆润泽医疗器械有限公司
Priority date: 2010-09-30
Filing date: 2011-08-24
Publication date: 2012-04-05
Also published as: EP2623052B1; EP2623052A1; CN101926672B; EP2623052A4; CN101926672A; US20130184731A1; US8900260B2

Abstract

A surgical milling cutter comprises a milling cutter bracket, a locking device and a bottom electric motor connected successively. The milling cutter bracket comprises a fixing seat (1) with a through hole. A finger guide apparatus (4) with an L-type first bracket at the top end thereof is provided on the upper part of the fixing seat (1). The end of the L-type first bracket's short edge (8) is provided with a downward projection (9). The lowest point of the projection (9) is lower than that of the milling cutter's cylindrical head (10) when the milling cutter is working normally. The surgical milling cutter utilizes the projection to prevent the possibility of an object contacting with the cylindrical head, thus avoiding the phenomenon of an object being cut unevenly. Meanwhile, the L-type bracket can be driven by the finger guide apparatus to rotate so as to change the running direction of the milling cutter, thus facilitating surgical procedures.

Description

Instruction manual

TECHNICAL FIELD The present invention relates to a surgical cutting instrument, and more particularly to a surgical milling cutter. BACKGROUND OF THE INVENTION During the surgical procedure, a milling cutter is required to perform some cutting work. The milling cutter consists of a milling cutter bracket, a locking device and a motor in order from top to bottom. The top end of the milling cutter holder has an L-shaped bracket, and a short hole is arranged on the short side of the L-shaped end, and a cylindrical head at the front of the milling cutter head protrudes into the hole. It is used to ensure the better force of the milling cutter. In order to protect the milling cutter, the cylindrical head does not penetrate completely into the hole, leaving some exposure to the outside. In the prior art, the short sides of the L-shape are all planar structures. When the object is cut, if the cylinder head touches the object, it will not have any effect on the object, which causes uneven cutting of the object. At the same time, in the process of cutting, the milling cutter is difficult to turn and is not convenient to use. SUMMARY OF THE INVENTION It is an object of the present invention to provide a surgical milling cutter that can be flexibly turned while the cylindrical head does not come into contact with the object being cut. In order to achieve the above object, the following technical solutions are adopted: A surgical milling cutter comprising a milling cutter carrier, a locking device and a bottom motor connected in series, the milling cutter carrier comprising a fixing seat having a through hole, characterized in that : a finger guide of the first bracket with an L-shaped top end is disposed at an upper portion of the fixing seat, and an end of the short side of the L-shaped first bracket is provided with a downward protrusion, and the lowest point of the protrusion is low a lowest point of the cylindrical head of the milling cutter when the milling cutter is working normally; a bolt having a through hole at the center is fixed in the cavity of the finger guide; the fixing Instruction manual

The upper portion of the seat is provided with a first pressing piece, and the nut is connected to the bolt through a hole in the first pressing piece; the locking device comprises: a boss having a through hole, and the inner wall of the small cylinder above the boss is disposed a bearing, the boss is also sleeved with a locking sleeve, the upper inner wall of the locking sleeve is provided with a protrusion, and the inner wall of the lower portion of the locking sleeve is tapered; the bottom surface of the tapered surface is disposed between the bottom surface of the boss and the upper bottom surface of the boss a spring, the second pressing piece is screwed to the outer wall of the top of the upper small cylinder of the boss and presses the protrusion; the wall of the small cylinder above the boss is provided with a tapered hole at a position corresponding to the tapered surface. A steel ball is disposed in the tapered hole.

In order to make the transmission rods evenly stressed, the bearings are two, respectively located below the outer wall and above the upper bottom surface.

In order to ensure the firmness of the two bearings, a support body is arranged between the two bearings. In order to facilitate the connection of the speed reducer, the inner wall of the large cylinder below the boss is provided with internal threads.

A bolt having a through hole at the center is fixed in the cavity of the finger guide; a pressing piece is disposed on an upper portion of the fixing seat, and the nut is connected to the bolt through a hole in the pressing piece.

A finger guide is disposed under the fixing seat, and a T-bolt is disposed in the cavity of the finger guide; a pressing piece is disposed on an upper portion of the fixing seat, and the nut is connected to the bolt through a hole in the pressing piece.

In order to keep the milling cutter running smoothly, the upper portion of the finger guide is provided with a bearing. In order to prevent the finger guide from being too flexible, a spring is also placed on the bolt. In order to prevent slippage, the outer surfaces of the fixing seat and the finger guide are provided with anti-slip grooves. The invention adopts a protrusion to block the possibility that the object is in contact with the cylindrical head, thereby avoiding the occurrence of uneven cutting of the object. At the same time, the L-type support can be driven by the finger guide Instruction manual

The rotation of the frame changes the running direction of the milling cutter to facilitate the operation during the operation.

DRAWINGS

1 is a schematic structural view of an entire embodiment of the present invention;

Figure 2 is a schematic structural view of the milling cutter bracket of Figure 1;

Figure 3 is a schematic view showing the structure of the locking device of Figure 1.

detailed description

The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments:

As shown in Figure 1 to Figure 3:

A surgical milling cutter comprising a fixing base 1 having a through hole, a finger guide 4 of a first bracket having an L-shaped top end is disposed at an upper portion of the fixing base 1, and an end of the short side 8 of the L-shaped first bracket Provided with a downward projection 9, the lowest point of the projection 9 is lower than the lowest point of the cylindrical head 10 when the milling cutter is normally operated; thus blocking the possibility of the object contacting the cylindrical head, thereby avoiding object cutting The occurrence of unevenness. The T-bolt 3 having a through hole is fixed in the cavity of the finger guide 4; the upper portion of the fixing base 1 is provided with a first pressing piece 7, and the nut 6 is connected to the bolt 3 through a hole in the first pressing piece 7.

The locking device comprises: a boss 2-1 having a through hole, and a bearing 2-8 is disposed on an inner wall of the small cylinder above the boss, and two bearings 2-8 are respectively located under the outer wall 2-7 and Above the upper bottom surface 2-10. A support body 2-12 is disposed between the two bearings 2-8. The two bearings can effectively ensure the smoothness of the transmission rod during rotation and reduce the heat generation. The upper bottom surface 2-10 is also threaded with the pressing parts 2-15 for tightening the bearings 2-8 and the support body 2-12. The firmness of the bearing 2-8 is not easy to fall off. The boss also has a locking sleeve 2-2, and the upper inner wall of the locking sleeve 2-2 is provided with a protrusion 2-5, and the lower inner wall has a tapered surface 2-3; Instruction manual

Between the bottom surface of 2-3 and the upper bottom surface 2-10 of the boss, a spring 2-9 is disposed; the second pressing piece 2-6 is screwed and pressed against the outer wall 2-7 of the top of the upper small cylinder of the boss. The protrusion 2-5; the wall of the small cylinder above the boss is provided with a tapered hole 2-11 leading to the through hole of the boss, and the tapered hole 2-11 is provided with the steel ball 2-4. The tapered holes 2-11 are provided with grooves 2-14 corresponding to the positions of the transfer rods 2-13 of the milling cutter. An internal thread is provided on the inner wall of the large cylinder below the boss 2-1. In this embodiment, of course, the number of the tapered holes 2-11 and the steel balls 2-4 is two, respectively. As an equivalent deformation, it can be set to three, so that the locking effect will be better.本With this locking structure, when you need to insert the transfer rod, just press the locking sleeve down. At this time, the tapered surface moves down and the steel ball rolls out. After the transfer rod reaches the specified position, the lock sleeve is released. Due to the action of the spring, the lock sleeve is raised, and the tapered surface is moved inward against the steel ball, and the card slot on the transfer rod is caught to fix the transfer rod. The locking method is simple and convenient for locking and loosening, and is firmer when locked, and has good safety performance.

The upper portion of the finger guide 4 is provided with a bearing 5. A spring 2 is also fitted over the bolt 3. The outer surfaces of the fixed seat 1 and the finger guide 4 are provided with anti-slip grooves. The bearing 5 can make the milling cutter have a closer force point to ensure the smooth running of the milling cutter, and the spring 2 ensures a certain force between the finger guide 4 and the fixing seat, preventing the finger guide 4 from rotating too flexiblely. The resulting operation error.

When the finger guide 4 is rotated, the bolt 3 and the nut 6 rotate together, so that the finger guide 4 can drive the L-shaped bracket to rotate, changing the running direction of the milling cutter, and facilitating the operation during the operation.

The above is only an embodiment of the present invention, and is not intended to limit the scope of the present invention. Any person skilled in the art can avoid the technical solution of the present invention. Any equivalents to the equivalents of the above-disclosed embodiments may be made without departing from the technical scope of the present invention, and any of the above embodiments may be made in accordance with the teachings of the present invention. Simple modifications, equivalent changes and modifications are still within the scope of protection of the technical solutions of the present invention.

Claims

Claim

A surgical milling cutter comprising a milling cutter carrier, a locking device and a bottom motor connected in series, the milling cutter carrier comprising a fixing seat (1) having a through hole, characterized in that: the top end is L-shaped a finger guide (4) of the first bracket is disposed at an upper portion of the fixing seat (1), and a distal end (8) of the first bracket short side (8) of the L-shaped bracket is disposed with a downward protrusion (9). The lowest point of the protrusion (9) is lower than the lowest point of the cylindrical head (10) of the milling cutter when the milling cutter is working normally;

A bolt (3) having a through hole at the center is fixed in the cavity of the finger guide (4); a first pressing piece (7) is disposed on an upper portion of the fixing seat (1), and the nut (6) passes through the first The hole in the tablet (7) is connected to the bolt (3);

The locking device includes: a boss (2-1) having a through hole, and a bearing (2-8) is disposed on an inner wall of the small cylinder above the boss, and the boss is further provided with a locking sleeve ( 2-2), the upper inner wall of the locking sleeve (2-2) is provided with a protrusion (2-5), and the lower inner wall of the locking sleeve (2-2) has a tapered surface (2-3); a tapered surface a spring (2-9) is disposed between the bottom surface of (2-3) and the upper bottom surface (2-10) of the boss; the second pressing piece (2-6) and the outer wall of the top of the small cylindrical body above the boss (2-7) Threading and pressing the projection (2-5) provided on the upper inner wall of the locking sleeve; the position of the wall of the small cylinder above the boss corresponding to the tapered surface (2-3) A tapered hole (2-11) is provided, and a steel ball (2-4) is disposed in the tapered hole (2-11).

2. The surgical milling cutter according to claim 1, wherein: the bearings (2-8) are two, respectively located below the outer wall (2-7) of the top of the upper small cylinder of the boss and Upper bottom surface of the boss

Above (2-10).

The surgical milling cutter according to claim 2, wherein a support body (2-12) is disposed between the two bearings (2-8).

The surgical milling cutter according to any one of claims 1 to 3, characterized in that the inner wall of the large cylinder below the boss (2-1) is provided with an internal thread.

The surgical milling cutter according to claim 4, wherein the upper portion of the finger guide (4) is provided with a bearing (5).

The surgical milling cutter according to claim 5, characterized in that: the bolt (3) is further provided with a spring (2).

The surgical milling cutter according to claim 6, wherein the outer surfaces of the fixing base (1) and the finger guide (4) are provided with anti-slip grooves.